<!DOCTYPE html>
<div style="overflow:hidden; margin-left:100px; margin-top:100px; width:100px; height:100px;">
  <div style="position:relative; left:-50px; top:-50px; width:200px; height:200px; transform:rotate(30deg);">
    <div style="will-change:opacity; overflow:hidden;">
      <div style="position:absolute; width:200px; height:200px; background:green;"></div>
    </div>
  </div>
</div>
This test succeeds if a non-rotated 100x100 green box is shown above.
